VERBS

be, feel, look
The bed felt comfortable
make sth
We must think how we can make the room more comfortable for you

ADV

extremely, incredibly, superbly, very, wonderfully
an extremely comfortable chair
perfectly
enough, fairly, moderately, quite, reasonably
The hotel was comfortable enough
surprisingly

VERBS

be, feel, look
Did you feel comfortable and relaxed at the party?
become, get
This bed is lumpy?I just can't seem to get comfortable
make sb/yourself
Make yourself comfortable!

ADV

very
completely, entirely, quite, totally
I was not entirely comfortable about the plans they had made

PREP

about
They didn't feel comfortable about her travelling alone
with
I don't feel comfortable with him

VERBS

be

ADV

very
quite, relatively
I had a relatively comfortable life in Brazil